Tenchi Muyo!

Tenchi Muyo is an manga and anime series metaverse currently spanning multiple OVAs, TV series, 3 movies, several spin-offs and special episodes as well as radio plays, Pen-and-Paper Games and Videogames.

It's about an part-alien Japanese shrine keeper/high school boy who encounters many strange alien & monster girls who eventually end up living in his house, competing for his affection...

Contents

Almost the entire fourth episode of the first OVA consists of nothing but the main cast relaxing in the hot springs. Ryoko Hakubi mocks Ayeka by pulling of her towel, so Tenchi gets to see her naked (Sasami stands in shadow with Ryo-Ohki on her head).

Ryoko and Ayeka start arguing about Tenchi's affection, getting Ryoko so enraged that she summons a water demon, all of this while completely naked. Because Ryoko didn't bring her power gems she's unable to keep control of the beast, so hilarity ensues while the gang has to fight against the demon, leading to some collateral damage.